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Division 6.3.2 Method to test the front window of the cab for sufficient resistance to projectiles

United Kingdom

Original text. Later amendments are not shown.

A cylindrical projectile shall be fired at the front window, the projectile shall have a hemispheric tip and have a total mass of 1 kg and be constructed as shown in Annex J. If the projectile sustains permanent damage after impact, it must be replaced.

For the test, the front window shall be fixed in a frame of the same construction as that mounted on the vehicle.

The temperature of the window during the tests must be between -15 °C and 35 °C. The projectile is assumed to impact at right angles to the window or alternatively the test window can be mounted at the same angle to the track as it is mounted in the vehicle.

The projectile's impact velocity shall be determined by:

Vp

  • Vmax + 160 km/h

    • Vp

  • velocity of the projectile in km/h on impact

    • Vmax

  • maximum velocity of the trainset in km/h

    • The test result shall be deemed satisfactory if:

    • the projectile does not break through the front window,

    • the window remains in its frame.